Well...

You better go back and recalculate...I bought a Nikon rangefinder a few years back...When I range a tree that is say, 26 yards from me and at the same height as me (my pull rope is 25 feet long and I'm usually about 20-22 feet up)...Then I range the same tree at 2-3 feet off the ground, I'll get 27 yards or so...Not enough for a hunter to worry about...